Question: When did J. Robert Oppenheimer begin the series as Julius?
Paraphrase: On what date did J. Robert Oppenheimer begin as Julius in the series?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q132537 p:P735 ?s . ?s ps:P735 wd:Q1102114 . ?s pq:P1545 ?value}